Counting Atoms

Front

How many different elements are present in H₂C₂H₃O₂?

Back

3

Front

Which of these elements is not present in NaNO₃? Options: sodium, hydrogen, oxygen, nitrogen

Back

hydrogen

Front

How many magnesium atoms are found in MgCl₂?

Back

1

Front

How many aluminum atoms are found in Al₂O₃?

Back

2

Front

How many sulfur atoms are present in Al₂(SO₄)₃?

Back

3

Front

A subscript will tell you the number of atoms of the element ___ it.

Back

before

Front

A subscript behind a set of parentheses belongs to

Back

all the elements within the parentheses before it

Front

If there is no subscript, how many atoms of that element are there?

Back

1

Front

How many atoms of carbon are in this compound? H₂C₃O₄N₅

Back

3

Front

How many oxygen atoms are found in Mg(NO₃)₂?

Back

6